from observermode.concreteobserver1 import ConcreteObserver1
from observermode.concreteobserver2 import ConcreteObserver2
from observermode.concretesubject import ConcreteSubject

subject = ConcreteSubject()
obs1 = ConcreteObserver1()
obs2 = ConcreteObserver2()
subject.add_observer(obs1)
subject.add_observer(obs2)
subject.notify_observers()
